macb: support DMA bus widths > 32 bits

[platform/kernel/linux-starfive.git] / drivers / net / ethernet / cadence / macb.h

/*
 * Atmel MACB Ethernet Controller driver
 *
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef _MACB_H
#define _MACB_H

/* MACB register offsets */
#define MACB_NCR                                0x0000
#define MACB_NCFGR                              0x0004
#define MACB_NSR                                0x0008
#define MACB_TSR                                0x0014
#define MACB_RBQP                               0x0018
#define MACB_TBQP                               0x001c
#define MACB_RSR                                0x0020
#define MACB_ISR                                0x0024
#define MACB_IER                                0x0028
#define MACB_IDR                                0x002c
#define MACB_IMR                                0x0030
#define MACB_MAN                                0x0034
#define MACB_PTR                                0x0038
#define MACB_PFR                                0x003c
#define MACB_FTO                                0x0040
#define MACB_SCF                                0x0044
#define MACB_MCF                                0x0048
#define MACB_FRO                                0x004c
#define MACB_FCSE                               0x0050
#define MACB_ALE                                0x0054
#define MACB_DTF                                0x0058
#define MACB_LCOL                               0x005c
#define MACB_EXCOL                              0x0060
#define MACB_TUND                               0x0064
#define MACB_CSE                                0x0068
#define MACB_RRE                                0x006c
#define MACB_ROVR                               0x0070
#define MACB_RSE                                0x0074
#define MACB_ELE                                0x0078
#define MACB_RJA                                0x007c
#define MACB_USF                                0x0080
#define MACB_STE                                0x0084
#define MACB_RLE                                0x0088
#define MACB_TPF                                0x008c
#define MACB_HRB                                0x0090
#define MACB_HRT                                0x0094
#define MACB_SA1B                               0x0098
#define MACB_SA1T                               0x009c
#define MACB_SA2B                               0x00a0
#define MACB_SA2T                               0x00a4
#define MACB_SA3B                               0x00a8
#define MACB_SA3T                               0x00ac
#define MACB_SA4B                               0x00b0
#define MACB_SA4T                               0x00b4
#define MACB_TID                                0x00b8
#define MACB_TPQ                                0x00bc
#define MACB_USRIO                              0x00c0
#define MACB_WOL                                0x00c4
#define MACB_MID                                0x00fc

/* GEM register offsets. */
#define GEM_NCFGR                               0x0004
#define GEM_USRIO                               0x000c
#define GEM_HRB                                 0x0080
#define GEM_HRT                                 0x0084
#define GEM_SA1B                                0x0088
#define GEM_SA1T                                0x008C
#define GEM_OTX                                 0x0100
#define GEM_DCFG1                               0x0280
#define GEM_DCFG2                               0x0284
#define GEM_DCFG3                               0x0288
#define GEM_DCFG4                               0x028c
#define GEM_DCFG5                               0x0290
#define GEM_DCFG6                               0x0294
#define GEM_DCFG7                               0x0298

/* Bitfields in NCR */
#define MACB_LB_OFFSET                          0
#define MACB_LB_SIZE                            1
#define MACB_LLB_OFFSET                         1
#define MACB_LLB_SIZE                           1
#define MACB_RE_OFFSET                          2
#define MACB_RE_SIZE                            1
#define MACB_TE_OFFSET                          3
#define MACB_TE_SIZE                            1
#define MACB_MPE_OFFSET                         4
#define MACB_MPE_SIZE                           1
#define MACB_CLRSTAT_OFFSET                     5
#define MACB_CLRSTAT_SIZE                       1
#define MACB_INCSTAT_OFFSET                     6
#define MACB_INCSTAT_SIZE                       1
#define MACB_WESTAT_OFFSET                      7
#define MACB_WESTAT_SIZE                        1
#define MACB_BP_OFFSET                          8
#define MACB_BP_SIZE                            1
#define MACB_TSTART_OFFSET                      9
#define MACB_TSTART_SIZE                        1
#define MACB_THALT_OFFSET                       10
#define MACB_THALT_SIZE                         1
#define MACB_NCR_TPF_OFFSET                     11
#define MACB_NCR_TPF_SIZE                       1
#define MACB_TZQ_OFFSET                         12
#define MACB_TZQ_SIZE                           1

/* Bitfields in NCFGR */
#define MACB_SPD_OFFSET                         0
#define MACB_SPD_SIZE                           1
#define MACB_FD_OFFSET                          1
#define MACB_FD_SIZE                            1
#define MACB_BIT_RATE_OFFSET                    2
#define MACB_BIT_RATE_SIZE                      1
#define MACB_JFRAME_OFFSET                      3
#define MACB_JFRAME_SIZE                        1
#define MACB_CAF_OFFSET                         4
#define MACB_CAF_SIZE                           1
#define MACB_NBC_OFFSET                         5
#define MACB_NBC_SIZE                           1
#define MACB_NCFGR_MTI_OFFSET                   6
#define MACB_NCFGR_MTI_SIZE                     1
#define MACB_UNI_OFFSET                         7
#define MACB_UNI_SIZE                           1
#define MACB_BIG_OFFSET                         8
#define MACB_BIG_SIZE                           1
#define MACB_EAE_OFFSET                         9
#define MACB_EAE_SIZE                           1
#define MACB_CLK_OFFSET                         10
#define MACB_CLK_SIZE                           2
#define MACB_RTY_OFFSET                         12
#define MACB_RTY_SIZE                           1
#define MACB_PAE_OFFSET                         13
#define MACB_PAE_SIZE                           1
#define MACB_RBOF_OFFSET                        14
#define MACB_RBOF_SIZE                          2
#define MACB_RLCE_OFFSET                        16
#define MACB_RLCE_SIZE                          1
#define MACB_DRFCS_OFFSET                       17
#define MACB_DRFCS_SIZE                         1
#define MACB_EFRHD_OFFSET                       18
#define MACB_EFRHD_SIZE                         1
#define MACB_IRXFCS_OFFSET                      19
#define MACB_IRXFCS_SIZE                        1

/* GEM specific NCFGR bitfields. */
#define GEM_CLK_OFFSET                          18
#define GEM_CLK_SIZE                            3
#define GEM_DBW_OFFSET                          21
#define GEM_DBW_SIZE                            2

/* Constants for data bus width. */
#define GEM_DBW32                               0
#define GEM_DBW64                               1
#define GEM_DBW128                              2

/* Bitfields in NSR */
#define MACB_NSR_LINK_OFFSET                    0
#define MACB_NSR_LINK_SIZE                      1
#define MACB_MDIO_OFFSET                        1
#define MACB_MDIO_SIZE                          1
#define MACB_IDLE_OFFSET                        2
#define MACB_IDLE_SIZE                          1

/* Bitfields in TSR */
#define MACB_UBR_OFFSET                         0
#define MACB_UBR_SIZE                           1
#define MACB_COL_OFFSET                         1
#define MACB_COL_SIZE                           1
#define MACB_TSR_RLE_OFFSET                     2
#define MACB_TSR_RLE_SIZE                       1
#define MACB_TGO_OFFSET                         3
#define MACB_TGO_SIZE                           1
#define MACB_BEX_OFFSET                         4
#define MACB_BEX_SIZE                           1
#define MACB_COMP_OFFSET                        5
#define MACB_COMP_SIZE                          1
#define MACB_UND_OFFSET                         6
#define MACB_UND_SIZE                           1

/* Bitfields in RSR */
#define MACB_BNA_OFFSET                         0
#define MACB_BNA_SIZE                           1
#define MACB_REC_OFFSET                         1
#define MACB_REC_SIZE                           1
#define MACB_OVR_OFFSET                         2
#define MACB_OVR_SIZE                           1

/* Bitfields in ISR/IER/IDR/IMR */
#define MACB_MFD_OFFSET                         0
#define MACB_MFD_SIZE                           1
#define MACB_RCOMP_OFFSET                       1
#define MACB_RCOMP_SIZE                         1
#define MACB_RXUBR_OFFSET                       2
#define MACB_RXUBR_SIZE                         1
#define MACB_TXUBR_OFFSET                       3
#define MACB_TXUBR_SIZE                         1
#define MACB_ISR_TUND_OFFSET                    4
#define MACB_ISR_TUND_SIZE                      1
#define MACB_ISR_RLE_OFFSET                     5
#define MACB_ISR_RLE_SIZE                       1
#define MACB_TXERR_OFFSET                       6
#define MACB_TXERR_SIZE                         1
#define MACB_TCOMP_OFFSET                       7
#define MACB_TCOMP_SIZE                         1
#define MACB_ISR_LINK_OFFSET                    9
#define MACB_ISR_LINK_SIZE                      1
#define MACB_ISR_ROVR_OFFSET                    10
#define MACB_ISR_ROVR_SIZE                      1
#define MACB_HRESP_OFFSET                       11
#define MACB_HRESP_SIZE                         1
#define MACB_PFR_OFFSET                         12
#define MACB_PFR_SIZE                           1
#define MACB_PTZ_OFFSET                         13
#define MACB_PTZ_SIZE                           1

/* Bitfields in MAN */
#define MACB_DATA_OFFSET                        0
#define MACB_DATA_SIZE                          16
#define MACB_CODE_OFFSET                        16
#define MACB_CODE_SIZE                          2
#define MACB_REGA_OFFSET                        18
#define MACB_REGA_SIZE                          5
#define MACB_PHYA_OFFSET                        23
#define MACB_PHYA_SIZE                          5
#define MACB_RW_OFFSET                          28
#define MACB_RW_SIZE                            2
#define MACB_SOF_OFFSET                         30
#define MACB_SOF_SIZE                           2

/* Bitfields in USRIO (AVR32) */
#define MACB_MII_OFFSET                         0
#define MACB_MII_SIZE                           1
#define MACB_EAM_OFFSET                         1
#define MACB_EAM_SIZE                           1
#define MACB_TX_PAUSE_OFFSET                    2
#define MACB_TX_PAUSE_SIZE                      1
#define MACB_TX_PAUSE_ZERO_OFFSET               3
#define MACB_TX_PAUSE_ZERO_SIZE                 1

/* Bitfields in USRIO (AT91) */
#define MACB_RMII_OFFSET                        0
#define MACB_RMII_SIZE                          1
#define MACB_CLKEN_OFFSET                       1
#define MACB_CLKEN_SIZE                         1

/* Bitfields in WOL */
#define MACB_IP_OFFSET                          0
#define MACB_IP_SIZE                            16
#define MACB_MAG_OFFSET                         16
#define MACB_MAG_SIZE                           1
#define MACB_ARP_OFFSET                         17
#define MACB_ARP_SIZE                           1
#define MACB_SA1_OFFSET                         18
#define MACB_SA1_SIZE                           1
#define MACB_WOL_MTI_OFFSET                     19
#define MACB_WOL_MTI_SIZE                       1

/* Bitfields in MID */
#define MACB_IDNUM_OFFSET                       16
#define MACB_IDNUM_SIZE                         16
#define MACB_REV_OFFSET                         0
#define MACB_REV_SIZE                           16

/* Bitfields in DCFG1. */
#define GEM_DBWDEF_OFFSET                       25
#define GEM_DBWDEF_SIZE                         3

/* Constants for CLK */
#define MACB_CLK_DIV8                           0
#define MACB_CLK_DIV16                          1
#define MACB_CLK_DIV32                          2
#define MACB_CLK_DIV64                          3

/* GEM specific constants for CLK. */
#define GEM_CLK_DIV8                            0
#define GEM_CLK_DIV16                           1
#define GEM_CLK_DIV32                           2
#define GEM_CLK_DIV48                           3
#define GEM_CLK_DIV64                           4
#define GEM_CLK_DIV96                           5

/* Constants for MAN register */
#define MACB_MAN_SOF                            1
#define MACB_MAN_WRITE                          1
#define MACB_MAN_READ                           2
#define MACB_MAN_CODE                           2

/* Bit manipulation macros */
#define MACB_BIT(name)                                  \
        (1 << MACB_##name##_OFFSET)
#define MACB_BF(name,value)                             \
        (((value) & ((1 << MACB_##name##_SIZE) - 1))    \
         << MACB_##name##_OFFSET)
#define MACB_BFEXT(name,value)\
        (((value) >> MACB_##name##_OFFSET)              \
         & ((1 << MACB_##name##_SIZE) - 1))
#define MACB_BFINS(name,value,old)                      \
        (((old) & ~(((1 << MACB_##name##_SIZE) - 1)     \
                    << MACB_##name##_OFFSET))           \
         | MACB_BF(name,value))

#define GEM_BIT(name)                                   \
        (1 << GEM_##name##_OFFSET)
#define GEM_BF(name, value)                             \
        (((value) & ((1 << GEM_##name##_SIZE) - 1))     \
         << GEM_##name##_OFFSET)
#define GEM_BFEXT(name, value)\
        (((value) >> GEM_##name##_OFFSET)               \
         & ((1 << GEM_##name##_SIZE) - 1))
#define GEM_BFINS(name, value, old)                     \
        (((old) & ~(((1 << GEM_##name##_SIZE) - 1)      \
                    << GEM_##name##_OFFSET))            \
         | GEM_BF(name, value))

/* Register access macros */
#define macb_readl(port,reg)                            \
        __raw_readl((port)->regs + MACB_##reg)
#define macb_writel(port,reg,value)                     \
        __raw_writel((value), (port)->regs + MACB_##reg)
#define gem_readl(port, reg)                            \
        __raw_readl((port)->regs + GEM_##reg)
#define gem_writel(port, reg, value)                    \
        __raw_writel((value), (port)->regs + GEM_##reg)

/*
 * Conditional GEM/MACB macros.  These perform the operation to the correct
 * register dependent on whether the device is a GEM or a MACB.  For registers
 * and bitfields that are common across both devices, use macb_{read,write}l
 * to avoid the cost of the conditional.
 */
#define macb_or_gem_writel(__bp, __reg, __value) \
        ({ \
                if (macb_is_gem((__bp))) \
                        gem_writel((__bp), __reg, __value); \
                else \
                        macb_writel((__bp), __reg, __value); \
        })

#define macb_or_gem_readl(__bp, __reg) \
        ({ \
                u32 __v; \
                if (macb_is_gem((__bp))) \
                        __v = gem_readl((__bp), __reg); \
                else \
                        __v = macb_readl((__bp), __reg); \
                __v; \
        })

struct dma_desc {
        u32     addr;
        u32     ctrl;
};

/* DMA descriptor bitfields */
#define MACB_RX_USED_OFFSET                     0
#define MACB_RX_USED_SIZE                       1
#define MACB_RX_WRAP_OFFSET                     1
#define MACB_RX_WRAP_SIZE                       1
#define MACB_RX_WADDR_OFFSET                    2
#define MACB_RX_WADDR_SIZE                      30

#define MACB_RX_FRMLEN_OFFSET                   0
#define MACB_RX_FRMLEN_SIZE                     12
#define MACB_RX_OFFSET_OFFSET                   12
#define MACB_RX_OFFSET_SIZE                     2
#define MACB_RX_SOF_OFFSET                      14
#define MACB_RX_SOF_SIZE                        1
#define MACB_RX_EOF_OFFSET                      15
#define MACB_RX_EOF_SIZE                        1
#define MACB_RX_CFI_OFFSET                      16
#define MACB_RX_CFI_SIZE                        1
#define MACB_RX_VLAN_PRI_OFFSET                 17
#define MACB_RX_VLAN_PRI_SIZE                   3
#define MACB_RX_PRI_TAG_OFFSET                  20
#define MACB_RX_PRI_TAG_SIZE                    1
#define MACB_RX_VLAN_TAG_OFFSET                 21
#define MACB_RX_VLAN_TAG_SIZE                   1
#define MACB_RX_TYPEID_MATCH_OFFSET             22
#define MACB_RX_TYPEID_MATCH_SIZE               1
#define MACB_RX_SA4_MATCH_OFFSET                23
#define MACB_RX_SA4_MATCH_SIZE                  1
#define MACB_RX_SA3_MATCH_OFFSET                24
#define MACB_RX_SA3_MATCH_SIZE                  1
#define MACB_RX_SA2_MATCH_OFFSET                25
#define MACB_RX_SA2_MATCH_SIZE                  1
#define MACB_RX_SA1_MATCH_OFFSET                26
#define MACB_RX_SA1_MATCH_SIZE                  1
#define MACB_RX_EXT_MATCH_OFFSET                28
#define MACB_RX_EXT_MATCH_SIZE                  1
#define MACB_RX_UHASH_MATCH_OFFSET              29
#define MACB_RX_UHASH_MATCH_SIZE                1
#define MACB_RX_MHASH_MATCH_OFFSET              30
#define MACB_RX_MHASH_MATCH_SIZE                1
#define MACB_RX_BROADCAST_OFFSET                31
#define MACB_RX_BROADCAST_SIZE                  1

#define MACB_TX_FRMLEN_OFFSET                   0
#define MACB_TX_FRMLEN_SIZE                     11
#define MACB_TX_LAST_OFFSET                     15
#define MACB_TX_LAST_SIZE                       1
#define MACB_TX_NOCRC_OFFSET                    16
#define MACB_TX_NOCRC_SIZE                      1
#define MACB_TX_BUF_EXHAUSTED_OFFSET            27
#define MACB_TX_BUF_EXHAUSTED_SIZE              1
#define MACB_TX_UNDERRUN_OFFSET                 28
#define MACB_TX_UNDERRUN_SIZE                   1
#define MACB_TX_ERROR_OFFSET                    29
#define MACB_TX_ERROR_SIZE                      1
#define MACB_TX_WRAP_OFFSET                     30
#define MACB_TX_WRAP_SIZE                       1
#define MACB_TX_USED_OFFSET                     31
#define MACB_TX_USED_SIZE                       1

struct ring_info {
        struct sk_buff          *skb;
        dma_addr_t              mapping;
};

/*
 * Hardware-collected statistics. Used when updating the network
 * device stats by a periodic timer.
 */
struct macb_stats {
        u32     rx_pause_frames;
        u32     tx_ok;
        u32     tx_single_cols;
        u32     tx_multiple_cols;
        u32     rx_ok;
        u32     rx_fcs_errors;
        u32     rx_align_errors;
        u32     tx_deferred;
        u32     tx_late_cols;
        u32     tx_excessive_cols;
        u32     tx_underruns;
        u32     tx_carrier_errors;
        u32     rx_resource_errors;
        u32     rx_overruns;
        u32     rx_symbol_errors;
        u32     rx_oversize_pkts;
        u32     rx_jabbers;
        u32     rx_undersize_pkts;
        u32     sqe_test_errors;
        u32     rx_length_mismatch;
        u32     tx_pause_frames;
};

struct gem_stats {
        u32     tx_octets_31_0;
        u32     tx_octets_47_32;
        u32     tx_frames;
        u32     tx_broadcast_frames;
        u32     tx_multicast_frames;
        u32     tx_pause_frames;
        u32     tx_64_byte_frames;
        u32     tx_65_127_byte_frames;
        u32     tx_128_255_byte_frames;
        u32     tx_256_511_byte_frames;
        u32     tx_512_1023_byte_frames;
        u32     tx_1024_1518_byte_frames;
        u32     tx_greater_than_1518_byte_frames;
        u32     tx_underrun;
        u32     tx_single_collision_frames;
        u32     tx_multiple_collision_frames;
        u32     tx_excessive_collisions;
        u32     tx_late_collisions;
        u32     tx_deferred_frames;
        u32     tx_carrier_sense_errors;
        u32     rx_octets_31_0;
        u32     rx_octets_47_32;
        u32     rx_frames;
        u32     rx_broadcast_frames;
        u32     rx_multicast_frames;
        u32     rx_pause_frames;
        u32     rx_64_byte_frames;
        u32     rx_65_127_byte_frames;
        u32     rx_128_255_byte_frames;
        u32     rx_256_511_byte_frames;
        u32     rx_512_1023_byte_frames;
        u32     rx_1024_1518_byte_frames;
        u32     rx_greater_than_1518_byte_frames;
        u32     rx_undersized_frames;
        u32     rx_oversize_frames;
        u32     rx_jabbers;
        u32     rx_frame_check_sequence_errors;
        u32     rx_length_field_frame_errors;
        u32     rx_symbol_errors;
        u32     rx_alignment_errors;
        u32     rx_resource_errors;
        u32     rx_overruns;
        u32     rx_ip_header_checksum_errors;
        u32     rx_tcp_checksum_errors;
        u32     rx_udp_checksum_errors;
};

struct macb {
        void __iomem            *regs;

        unsigned int            rx_tail;
        struct dma_desc         *rx_ring;
        void                    *rx_buffers;

        unsigned int            tx_head, tx_tail;
        struct dma_desc         *tx_ring;
        struct ring_info        *tx_skb;

        spinlock_t              lock;
        struct platform_device  *pdev;
        struct clk              *pclk;
        struct clk              *hclk;
        struct net_device       *dev;
        struct napi_struct      napi;
        struct net_device_stats stats;
        union {
                struct macb_stats       macb;
                struct gem_stats        gem;
        }                       hw_stats;

        dma_addr_t              rx_ring_dma;
        dma_addr_t              tx_ring_dma;
        dma_addr_t              rx_buffers_dma;

        unsigned int            rx_pending, tx_pending;

        struct mii_bus          *mii_bus;
        struct phy_device       *phy_dev;
        unsigned int            link;
        unsigned int            speed;
        unsigned int            duplex;
};

static inline bool macb_is_gem(struct macb *bp)
{
        return MACB_BFEXT(IDNUM, macb_readl(bp, MID)) == 0x2;
}

#endif /* _MACB_H */